I have a 93 ford F150 5.0/347 with a E4OD and it hasnt run right in so long i cant remember. I get about 10-11 MPG and i have had drivablity issues since the engine was done. It got a 347 with cleaned up and matched E7TE heads, a Ford Explorer cam, Hedman long tubes with a 3 inch single and a flowmaster 40 running 24lb injectors with a diablo 2 tune chip. It runs ok but i dont think anywhere close to has clean as it should It was making about 230 at the rear wheels when the chip was doneon the chassis dyno, but it was never right. Anyhow I have everything now to convert to a WAY1 computer, Fresh flow matched 19lb injectors, and i have built up a the new injector harness, mass air harness, and air temp sensor. I was looking over the pins and what had to be moved and noticed that the mass air trucks do not run a MAP sensor? is that right or am i missing something? I put a mustang 5.0 mass air engine into my old ranger and i was sure it had a mass air meter and a MAP or looked like a map??

 

You are partially correct. The sensor you are referring to is BARO, not MAP. Most MAF Ford cars use a BARO (Barometric pressure) not a MAP (Manifold Absolute Pressure) sensor. As you have indicated the truck MAF systems do not use either a MAP or BARO. Seems odd, but that is the way Ford designed it.

 

Seems odd that they have no way to measure atmospheric pressure.

 

The atmospheric pressure measurement is almost redundant when the air mass entering the engine is measured directly by the mass airflow meter. Changes in atmospheric pressure change the density of air, which changes the mass per volume of air ingested into the engine. The air mass change is measured and fuel and spark are adjusted accordingly.

The early MAF vehicles used a BAP sensor, but I don't know how it was used in the control strategy. I seem to remember the early MAF computers controlling spark based on throttle and RPM, which would need the BAP to alter spark advance with changes in air pressure/density.

 

Post lots of pics please

 

Post a lot of pics please

 

Whats the barometric sensor? Is it the one in the air cleaner box on MAF trucks? I thought that was air temperature.

 

MAF trucks did not have a barometric pressure sensor as far as I know. The 89-93 mustangs used a BAP sensor, which was just a MAP sensor with the normal vacuum port left open to the atmosphere.

 

you injection guys amaze me. do most of you figure it out on your own or are you in auto mech. classes? i'm a youngin' at 24 but the injunktion computation machines are way past what i wanna think about. i'm glad my truck hasn't had any issues.

 

Lots of research and ask alot of questions, then figure out what is BS and whats fact. My truck being a E4OD trans really makes it a pain in the butt finding the right computer. The other thing i found after i got my WAY1 computer is it only uses 1 O2 instead of 2 like a mustang one for each bank. Ford was to cheap to change the stock Y pipe i guess from the old speed density exhaust system. I think a couple of the 5.8 mass air computers did have dual O2 sensors, but i already have this one so ill run with it.

This website sats i cant attach to the posts what do i have to do to get this function unlocked? I'll take a ton of pics during the swap. i'm sure i will run into something that i'm not ready for thats my luck.

 

Like Shuttlevalve said, you read and learn. I have been bending wrenches since 1976. I learned carbs on my own in my pre-teens. I chose not to work in the automotive field for a living years ago but still love tinkering on anything with a gas engine. I work in the electronics field so the jump to EFI is just a matter of terminology and methodology of how the manufacturer sets up their systems. It also helps to be a self-educated hacker...

 

Dual O2 sensors aren't really needed, I converted my truck to dual sensors this year and after some analysis with the Tweecer I put it back to a single sensor because the motor ran exactly the same.. injector trims were nearly identical so there's no point.

 

I ran into another thing today. Where would be the best place to use airtemp from?? My speed density picked up the airtemp from the intake manifold the new airbox has a airtemp in it. What would be better for my MASS air WAY1 computer to get the reading from?? i had heard on some tuning page that the eariler intake manifold reading was better for forced inductions, but i'm not going down that road inthe near future.

 

Mostly from various things I've read, either on the internet or the Ford EFI book I have. I did a pretty good amount of dyno tuning for a school race car project when I was in college, which also taught me a lot and gave me a good deal of hands on experience.

I would locate the air temp sensor in the same place as on the factory MAF truck that you got the system from. All the calibration was done using that location, so I wouldn't move it elsewhere.

 

I would locate the air temp sensor in the same place as on the factory MAF truck that you got the system from. All the calibration was done using that location, so I wouldn't move it elsewhere.[/QUOTE]

Well Thats a bit confusing, the 94-95 air box i picked up has the air temp in it, but the wiring diagram i down loaded from EEC Performance.com shows the air temp on the 95 mass air F150 being located in the intake manifold by the #6 runner. It looks like a scaned image from some kind of factory manual. That doesnt mean its right, but it could be mounted either place it seems just wondering where the WAY1 computer was calibrated for the outside air temp coming into the box or the hot intake manifold. i think i will wire it into the airbox and hope for the best.